Autor: Urbańczyk, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Road safety in the EU: comparisons in the period 2001-2016
Autorzy:: Urbańczyk, R.
Powiązania:: https://bibliotekanauki.pl/articles/198247.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: road traffic safety
statistics of accidents
statistics of fatalities
bezpieczeństwo ruchu drogowego
statystyki wypadków
statystyki ofiar śmiertelnych
Opis:: This article presents traffic safety statistics in the area of the EU. Changes in the number of deaths and injuries and the number of accidents have been reported since 2001, given the initiatives taken since this year to implement safety improvement programmes. The statistics on traffic accidents and the number of deaths in each EU country are presented. The situation concerning Poland among the EU countries is also presented by creating a classification that takes into account additional reference factors.
Źródło:: Zeszyty Naukowe. Transport / Politechnika Śląska; 2017, 97; 189-200
0209-3324
2450-1549
Pojawia się w:: Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Emission of Polychlorinated Dibenzo-p-Dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) from Underfiring System of Coke Oven Battery
Autorzy:: Bigda, R.
Urbańczyk, W.
Mianowski, A.
Sobolewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/123255.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: coke oven battery
PCDDs
PCDFs
dioxins
emission measurement
coke plant
Opis:: A coke oven battery is not considered as a significant source of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) emissions; however, due to small amounts of chlorine in coal dioxins, dibenzofurans may be formed. The paper presents the attempts to determine the level of emission of PCDDs/PCDFs from the COB underfiring system and to confront the obtained results with the calculations based on the mass balance of chlorine in the coking process and reactions of both chlorophenols formation and PCDDs and PCDFs formation from mono- and polychlorophenols. There were PCDDs/PCDFs concentrations measured in flue gases from the underfiring system of two COBs at a Polish coking plant. The measurements included both an old and a new battery. The obtained concentrations of PCDDs/PCDFs were lower than reported in the literature (0.5-1.7 ng I-TEQ/Mg_coke), while the results for old COB were on average 3 times higher than for the new one. It was found that PCDDs/PCDFs emission from COB underfiring system is insignificant and that PCDDs/PCDFs formation during coal coking should consider the mechanisms of their formation from mono- and polychlorophenols, as well as the influence of process parameters on the synthesis.
Źródło:: Journal of Ecological Engineering; 2017, 18, 6; 21-29
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: SAW sensor for detection of hydrocarbons. Numerical analysis and experimental results
Autorzy:: Hejczyk, T.
Urbańczyk, M.
Wituła, R.
Maciak, E.
Powiązania:: https://bibliotekanauki.pl/articles/201623.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: SAW
gas sensor
piezoelectric substrate
Ingebrigtsen's formula
impedance transformation law
numerical modeling
Opis:: The paper presents the results of numerical analyses of the SAW gas sensor in the steady and non-steady state. The effect of SAW velocity changes vs. the surface electrical conductivity of the sensing layer is predicted. The conductivity of the porous sensing layer above the piezoelectric waveguide depends on the profile of the diffused gas molecule concentration inside the layer. Knudsen's model of gas diffusion was used. Numerical results for the gases CH4, C2H4, C3H8, C6H6 in the steady state and CH4 in the non-steady state in the WO3 sensing layer have been shown. The results of numerical analyzes allow to select the sensor design conditions, including the morphology of the sensor layer, its thickness and operating temperature. Some numerical results were verified in experimental studies concerning methane.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 589-595
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Microstructural Features and Mechanical Properties after Applying Rolling with Cyclic Movement of Rolls of an Al-Li Alloys
Autorzy:: Brzezińska, A.
Urbańczyk-Gucwa, A.
Molak, R.
Rodak, K.
Powiązania:: https://bibliotekanauki.pl/articles/352162.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Al-Li alloy
severe plastic deformation
ultrafine-grains
STEM
SEM/EBSD
Opis:: Two strength-age hardening aluminum-lithium alloys: Al-2.3wt%Li and Al-2.2wt%Li-0.1wt%Zr in two different heat treatment conditions: solution state (S) and additionally in aging state (A) were severely plastically deformed by rolling with cyclic movement of rolls (RCMR) method to produce ultrafine - grained structure. Two thermo-mechanical treatments were used: (S+A+RCMR) and (S+RCMR+A+RCMR). To investigate the combined effect of plastic deformation and heat treatment, tensile tests were performed. Microstructural observations were undertaken using scanning transmission electron microscopy (STEM), and scanning transmission electron microscopy (SEM) equipped with electron backscattering diffraction detector (EBSD). Based on the obtained results, it can be deduced that maximum mechanical properties as: yield strength (YS) and ultimate tensile strength (UTS) couldbe achieved when the microstructure of alloys is in (S+A+RCMR) state. For samples in (S+RCMR+A+RCMR) state, ductility is higher than for (S+A+RCMR) state. The microstructural results shows that the favourable conditions for decreasing grain size of alloys is (S+A+RCMR) state. Additionally, in this state is much greater dislocation density than for (S+RCMR+A+RCMR) state. The microstructure of alloys in (S+RCMR+A+RCMR) state is characterized by grains/subgrains with higher average diameter and with higher misorientation angles compared with (S+A+RCMR) state.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 4; 1533-1540
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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